American Cyanamid principles

Guidelines set out in the case of American Cyanamid Co (No 1) v Ethicon Ltd [1975] UKHL 1 (05 February 1975) to establish whether an applicant has an adequate case for the granting of an interim injunction ( www.practicallaw.com/A35414). The guidelines consider:

  • Is there a serious issue to be tried?

  • If so, what is the balance of convenience?

For further guidance, see Practice note, Injunctions: an overview ( www.practicallaw.com/3-619-2826) .

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